package com.sky.interceptor;

import com.sky.constant.JwtClaimsConstant;
import com.sky.context.BaseContext;
import com.sky.properties.JwtProperties;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
public class JwtTokenAdminInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;

    /**
     * 校验jwt
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String token;
        String secretKey;
        String requestURI = request.getRequestURI();

        if (requestURI.startsWith("/user/")) {
            token = request.getHeader(jwtProperties.getUserTokenName());
            secretKey = jwtProperties.getUserSecretKey();
            log.info("用户端jwt校验:{}", token);
        } else {
            token = request.getHeader(jwtProperties.getAdminTokenName());
            secretKey = jwtProperties.getAdminSecretKey();
            log.info("管理端jwt校验:{}", token);
        }

        //2、校验令牌
        try {
            Claims claims = JwtUtil.parseJWT(secretKey, token);
            String character =claims.get(JwtClaimsConstant.CHARACTER).toString();
            if(character.equals("1")){
                String empId = claims.get(JwtClaimsConstant.CHARACTER).toString();
                log.info("当前员工id：", empId);
                BaseContext.setCurrentId(Long.valueOf(empId));
            }
                else {
                Long userId = Long.valueOf(claims.get(JwtClaimsConstant.CHARACTER).toString());
                log.info("当前用户id：", userId);
                BaseContext.setCurrentId(userId);
            }
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }
}
